1 /*
2 * Copyright (c) 2016, 2020, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 package gc.class_unloading;
25
26 /*
27 * @test TestClassUnloadingDisabledSerial
28 * @bug 8114823
29 * @requires vm.opt.ExplicitGCInvokesConcurrent != true
30 * @requires vm.opt.ClassUnloading != true
31 * @requires vm.gc.Serial
32 * @library /test/lib
33 * @modules java.base/jdk.internal.misc
34 * java.management
35 * @build sun.hotspot.WhiteBox
36 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
37 *
38 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
39 * -XX:-ClassUnloading -XX:+UseSerialGC gc.class_unloading.TestClassUnloadingDisabled
40 *
41 */
42
43 /*
44 * @test TestClassUnloadingDisabledParallel
45 * @bug 8114823
46 * @requires vm.opt.ExplicitGCInvokesConcurrent != true
47 * @requires vm.opt.ClassUnloading != true
48 * @requires vm.gc.Parallel
49 * @library /test/lib
50 * @modules java.base/jdk.internal.misc
51 * java.management
52 * @build sun.hotspot.WhiteBox
53 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
54 *
55 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
56 * -XX:-ClassUnloading -XX:+UseParallelGC gc.class_unloading.TestClassUnloadingDisabled
57 *
58 */
59
60 /*
61 * @test TestClassUnloadingDisabledG1
62 * @bug 8114823
63 * @requires vm.opt.ExplicitGCInvokesConcurrent != true
64 * @requires vm.opt.ClassUnloading != true
65 * @requires vm.gc.G1
66 * @library /test/lib
67 * @modules java.base/jdk.internal.misc
68 * java.management
69 * @build sun.hotspot.WhiteBox
70 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
71 *
72 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
73 * -XX:-ClassUnloading -XX:+UseG1GC gc.class_unloading.TestClassUnloadingDisabled
74 *
75 */
76
77 /*
78 * @test TestClassUnloadingDisabledShenandoah
79 * @bug 8114823
80 * @requires vm.gc.Shenandoah
81 * @requires vm.opt.ExplicitGCInvokesConcurrent != true
82 * @requires vm.opt.ClassUnloading != true
83 * @library /test/lib
84 * @modules java.base/jdk.internal.misc
85 * java.management
86 * @build sun.hotspot.WhiteBox
87 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
88 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
89 * -XX:-ClassUnloading -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC gc.class_unloading.TestClassUnloadingDisabled
90 */
91
92 import java.io.File;
93 import java.io.IOException;
94 import java.nio.file.Files;
95 import java.nio.file.Path;
96 import java.nio.file.Paths;
97
98 import sun.hotspot.WhiteBox;
99
100 import static jdk.test.lib.Asserts.*;
101
102 public class TestClassUnloadingDisabled {
103 public static void main(String args[]) throws Exception {
104 final WhiteBox wb = WhiteBox.getWhiteBox();
105 // Fetch the dir where the test class and the class
106 // to be loaded resides.
107 String classDir = TestClassUnloadingDisabled.class.getProtectionDomain().getCodeSource().getLocation().getPath();
108 String className = "gc.class_unloading.ClassToLoadUnload"; // can not use ClassToLoadUnload.class.getName() as that would load the class
109
110 assertFalse(wb.isClassAlive(className), "Should not be loaded yet");
111
112 // The NoPDClassLoader handles loading classes in the test directory
113 // and loads them without a protection domain, which in some cases
114 // keeps the class live regardless of marking state.
115 NoPDClassLoader nopd = new NoPDClassLoader(classDir);
116 nopd.loadClass(className);
117
118 assertTrue(wb.isClassAlive(className), "Class should be loaded");
119
120 // Clear the class-loader, class and object references to make
121 // class unloading possible.
122 nopd = null;
123
124 System.gc();
125 assertTrue(wb.isClassAlive(className), "Class should not have ben unloaded");
126 }
127 }
128
129 class NoPDClassLoader extends ClassLoader {
130 String path;
131
132 NoPDClassLoader(String path) {
133 this.path = path;
134 }
135
136 public Class<?> loadClass(String name) throws ClassNotFoundException {
137 byte[] cls = null;
138 File f = new File(path,name + ".class");
139
140 // Delegate class loading if class not present in the given
141 // directory.
142 if (!f.exists()) {
143 return super.loadClass(name);
144 }
145
146 try {
147 Path path = Paths.get(f.getAbsolutePath());
148 cls = Files.readAllBytes(path);
149 } catch (IOException e) {
150 throw new ClassNotFoundException(name);
151 }
152
153 // Define class with no protection domain and resolve it.
154 return defineClass(name, cls, 0, cls.length, null);
155 }
156 }
157
158 class ClassToLoadUnload {
159 }